There are two things that need to be done in order to access a Web Service through a portlet. The first is have access to a Web Service either through UDDI registry, WSDL URL or running in the Rational Application Developer workspace. And the second is create a portlet that provides access to this Web Service. In Rational Application Developer V6 Web Service Client portlet applications are developed within Faces portlet projects and a wizard is provided to adding Web Services to Faces portlet pages.
Figure 28-1 shows how portlet applications can be easily integrated with existent Web Services without the need to write extra code.